Central Bureau for Astronomical Telegrams
IAUC 4006: 1984r; 1984m; 1984i
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Read IAUC 4007
Circular No. 4006
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM Telephone 617-495-7244/7440/7444
COMET SHOEMAKER (1984r)
The following precise positions are by T. Seki, Geisei:
1984 UT R.A. (1950.0) Decl. m1
Nov. 2.75842 3 10 41.23 +17 36 36.8 16.5-17
3.77101 3 09 15.73 +17 30 46.3 16.5-17
Parabolic orbital elements determined by S. Nakano, Tokyo,
from six observations Oct. 23 to Nov. 3:
T = 1984 Oct. 14.798 ET Peri. = 187.616
Node = 237.930 1950.0
q = 5.50417 AU Incl. = 179.208
1984 ET R.A. (1950.0) Decl. p r m1
Oct. 27 3 20.08 +18 13.8 4.556 5.505 16.7
Nov. 6 3 06.12 +17 17.9
16 2 52.08 +16 17.4 4.528 5.509 16.7
26 2 38.57 +15 15.4
Dec. 6 2 26.16 +14 15.2 4.679 5.517 16.8
PERIODIC COMET SCHAUMASSE (1984m)
Total visual magnitude estimates: Oct. 6.52 UT, [12.5 (C. S.
Morris, Whitaker Peak, CA, 0.25-m refl.); Oct. 26.20, 11.0 (J. D.
Shanklin, Cambridge, Eng., 0.33-m refl.); Nov. 3.53, 11.7 (Morris).
COMET AUSTIN (1984i)
Total visual magnitude estimates: Oct. 18.85, 9.1 (Shanklin,
20 x 80 binoculars); 21.13, 9.6 (Shanklin); 26.08, 10.2 (Shanklin):
31.15, 8.9 (J. Bortle, Stormville, NY, 10 x 50 binoculars); Nov.
3.50, 9.0 (Morris, 20 x 80 binoculars).
Ephemeris continuation from the elements on MPC 9154:
1984 ET R.A. (1950.0) Decl. p r m1
Nov. 16 1 12.72 +31 56.7 1.148 2.053 10.9
26 0 47.91 +25 57.0
Dec. 6 0 35.38 +21 48.2 1.685 2.358 12.4
16 0 29.83 +19 01.4
26 0 28.53 +17 12.0 2.304 2.647 13.5
1984 November 5 (4006) Brian G. Marsden
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